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Firefox hangs at start on Windows 7 Pro 64-bit system

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I'm running Firefox 10 on a system with Windows 7 Pro 64-bit installed. Firefox was working OK until yesterday - now it ceases responding every time I try to start it - whether I ask it to restore my last session or start a new one.

I'm running Firefox 10 on a system with Windows 7 Pro 64-bit installed. Firefox was working OK until yesterday - now it ceases responding every time I try to start it - whether I ask it to restore my last session or start a new one.

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Hi tjfilipi

Firefox may hang if left open for long periods of time. To fix the issue, restart Firefox.

If you regularly leave Firefox open so that you return to where you left off or if you have many tabs to restore, Firefox may hang while loading those sites. Try the following solution, it might solve the problem:

Check Don't load tabs until selected: Configuring session restore